First, this exchange seemed underscore somerecentarticles stating that teens are not nearly as naive and vulnerable online as people think.

However, I wondered about the appropriateness of the phrase "open book" in this context. It's akin to television shows telling people "don't touch that dial," even though no one uses a dial to change channels anymore.

Perhaps it is only a matter of time until the hip screenagers and millennials replace the phrase "my life is an open book" with "my life is a public profile."

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